Siphon flush valve



Aug. 20, 1929. G. N. GARABEDIAN SIPHON FLUSH VALVE Filed May 7, 1928 il if 2 Z7 e 7 ag 6 save forobe ar'valz @y c1- 1-4," I.

Patented Aug. 20, 1.929.

UNITED STATES GEORGE N. GARABEDIAN, F WORCESTER, MSSACHUSETTS.

SIPHON FLUSH VALVE.

Application led May 7, 1928. `Serial No. 275,589.

This invention has relation in general to flush-tanks for water-closets and in part-icular to the siphon valves commonly used to accomplish the rapid discharge of the water in the tank into the water-closet for flushing the latter.

The invention has as its main purpose the provision of improved means of starting the action of the Siphon in order to effect flushing. The particular objects of the invention are to provide a structureto accomplish this end having advantages over prior devices through the elimination of valves, packings, and other means of directing and controlling the How which commonly cause leakage and other troubles in prior devices as a result of wear, and through positively providing against overfiowing of the tank.

An illustrative embodiment of the invention is shown in the accompanying drawings. in which,-

Fig. 1 is a longitudinal vertical section oi' a tank showing the improved devices comprising the invention, also in vertical section, and in the normal positionready to operate to start the siphon.

Fig. 2 is a view similar to Fig. 1 showing the parts in the relation assumed when actu ated to accomplish flushing; and

Fig. 3 is a diagrammatic view of a modified structure.

through a pipe 2 connected with the interior of such tank, to effect the flushing of a watercloset or other device with which the lower.

. end of said pipe 2 may be combined. The

pipe 2 constitutes Vthe long leg of the siphon.

and extends upward within the tankl to a height approximately equalling the height of the head of water desired to be maintained within the tank, and is equipped with a manifold 3 comprising a central aperture -which is placed in screw-threaded or other engagement with the upper end of pipe 2, and which has formed therein reverse bends 4., 4, to the screw-threaded lower end of onc of which is applied a pipe 5 constituting the short leg of the Siphon and extending down with its open end just above the bottom of the tank. A similar pipe 6 is applied to the screw-threaded open end of the other of said reverse bends 4, extending down any suitable or desired distance in the direction of the bottom of the tank, and combined in any suitable manner, as by the conduit 7 and unions 8, 8, with a cylinder 9 disposed upright in the tank and provided with a bottom opening or port 10 communieating with the said conduit 7. This cylinder 9 is also provided with lateral openings 11, 11, or if preferred, open-topped notches or slots extending down from the rim 25 of the open top of the cylinder, disposed therein with their bottom edges at a height not greater than the Water-level which will be maintained in the tank when filled to the predetermined level by the supplymeans, the latter being of any common or preferred form.

\Vithin the cylinder 9 is provided a fairly closely-fitting piston 12 mounted on a piston rod 13 which is slidably mountedin a guide 1'4 formed at the center of the top of the cylinder, as upon a strut 15. The portion of such piston rod extending upwardly through the top ofV such guide 14 is combined in suitable manner with some such ydevice as a bell-crank 16 so that the piston 12 may be actuated downward when it is desired to discharge the contents of the vtank through the Siphon. This bell-crank 16 is pivoted on a pin 17 in a bracket 18 on the edge of the tank, pivotally combined at 19 with the upper end of piston rod 13, and equipped with a chain 20 or other device through which the lever may be depressed 4manually to force the piston downward.

An expanding spiral spring 21 applied to the piston rod 13 and confined between the guide 14 on the top of the cylinder and a suitable stop suchk as the pin 22, tends to keep the piston 12 uplifted above the level of theA openings l1, 11, and consequently to keep the bell-crank 16 and its chain upheld. To retard a sudden flow an upwardly and backwardly slanting integral wall 26 is provided in the manifold.

`The operation of the device is simple and will be easily understood. Vith the tank filled and the parts at rest in their normal relation ready for the flushing operation. the bell-crank 16 and the piston l2 are in upraised position as shown in Fig. 1, and the cylinder 9 is full of water which has flowed in through the openings 11, 11. When the bell-crank 16 is rocked, the piston 12 is forced downwardly past the openings 1l, 11, and during the remainder of its downward travel forces the contents of the cylinder 9 out through the port 1() and through the conduits 7 and 6 into the manifold 3.

The piston and cylinder constitute in effecta pump to inject the contents of the cylinder into the top of the siphon. Thence the contents descend through the pipe 2 which constitutes the long leg of the siphon and which has remained empty up to this moment. W'ith the pipe 2 lilled with water'thus eX- pelled from the cylinder, to a point below the level of the bottom of pipe 5, the siphon is started, and water is drawn upward from pipe 5 through the reverse bend 4 in communication therewith, and continues to flow downward under gravity through the pipe 2 unt-il the contents of the tank are exhausted down to the level of the bottom of such pipe 5.

Wvhen the pipe 2 has thus drained empty again, and air is admitted beneath the piston through conduits 6 and 7, the spring 2l acts to move the piston l2 reversely upward in the cylinder 9 to its starting point above the level of the openingsv 11, 11, therein. Thereafter the supply means refills the tank to a. point slightly above the level of such openings, whereupon the cylinder again lills with water overiiowing thereinto through the said openings l1, 11, and the Vdevice is in readiness to function again.

As will have been observed, the device of the invention in its simplicity has entirely 'eliminated the use of moving valves, gates,

etc., for controlling and directing the course of the water in discharging or refilling. Also, no packing or glands applied to moving members are used or needed in the entire structure. Thus a serious limitation in the utility and life of prior types of these devices is eliminated; manufacturing costs are reduced, and Wear, leakage, and sticking of such parts are not factors to be contended with in the present invention. There are no submerged moving parts subject to corrosion, other than the piston and a portion of itsV piston rod, and the wide clearance permissible in the fit of the piston in its cylinder reduces all practical chance of trouble arising in connection therewith. The conduit comprising the Siphon is air-tightat all times as a result ,of such absence of valves, glands, etc., from its walls, and

break the siphon undesiredly. Further, the short leg of the siphon is always open to provide an overflow of the tank-contents into the discharge pipe The design of the present device does not require the closing of the short leg of the siplion by a valve or gate while water is being introduced into the long leg to start the siphon; there is no valve thus employed to block escape of water in the common event of the automatic supply-valve failing to shut off the supply completely when the tank has been refilled to the predetermined water-level. Thus the tank in which the present invention is installed cannot overflow to do damage.

In Fig. 3 l have shown a. modified construction in which the piston is of sub stantial weight andV operates under the force .of gravity, the inoperative upward stroke being manually performed.

Although I have illustrated and described only two forms of the invention, I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore, I'do not wish to be limited in this respect.

Vlhat I claim as my invention is,-

l. A siphon for the purpose described comprising a long discharge leg, a short supply leg and a manifold connecting them at the top, said manifold having an integral wall extending upwardly and backwardly from a point between the two legs to retard a sudden flow.

2. A siphon for the purpose described comprising a long outlet leg, two short supply legs and a manifold connecting the three legs together and consisting of asingle member having passages from both of the supply'legs to Vthe outlet leg and two walls projecting inwardly from a position between the centraloutlet leg and each of the supply legs in opposite directions and upwardly and a central projection extending downwardly directly over the outlet leg' to prevent .the water .from passing -up one supply leg and lshooting across into the other one.

In testimony f whereof I have hereunto a'liixed my signature.

Geenen N. eainiennnin. 

